Define the materials in the structure and their properties in the Constituent Materials tab.

The Temperature is selectable in Kelvin [K], Celsius [°C], and Fahrenheit [°F], and has a default value of 293.15 K, 20.0 °C, or 68 °F, respectively.

The fluid flowing through all pore and porous materials can be set by clicking Set all Fluids to and selecting it from the pull-down menu.

If one of the predefined fluids is used, the values for Density, Dynamic Viscosity, and Kinematic Viscosity are taken from the material database and are dependent on the given Temperature value. If Manual is chosen, you can enter these values manually.

Any values entered manually, e.g., those for a special type of oil, can also be added to the Material Database. Find more information on editing, expanding, and using the material database in the respective user guide.

As soon as you define the fluid in the pull-down menu, this choice appears under the Material subtab. Now this fluid is shown to occupy the previously unassigned pore space with the ID 00 and in the porous material with the ID 02. The density and the dynamic viscosity of this fluid, at the selected temperature range, is shown under the Fluid Density/Viscosity subtab.

All materials assigned to the material IDs, which fall into one of the material categories (pore, porous or solid), can be selected individually through the Material Selector dialog, by clicking on the material’s buttons. Fluid flow can occur only in pores and in porous materials.

Under the Constituent Materials tab the effective diffusivity of the solute in the fluid and porous materials needs to be defined. Here two options are available for the Diffusivity Input Mode:

by Effective Diffusivity

by Porosity/Tortuosity

For porous materials, their permeability needs to be defined on the Permeability subtab.